High-strength rake plate of agricultural machine

Abstract

A high-strength rake plate of an agricultural machine belongs to the technical field of large agricultural harvesters and comprises a rake plate body with a U-shaped side section, the middle of the front end of the rake plate body extends downwards to form a protruding portion, the top of the front end of the rake plate body is intermittently provided with an arc wave structure, and a plurality of reinforcing ribs are evenly distributed in the rake plate body. A plurality of round holes are formed in the two sides of the interior of the rake plate body. The structure strength of the harrow plate body can be greatly enhanced, the service life is prolonged, and the use requirement of a large harvester is met. Meanwhile, the structure is symmetrical, the layout is reasonable, and the uniformity of stress and the compactness of the structure can be enhanced. The manufacturing method preferably adopts die casting and surface strengthening treatment, so that the wear resistance can be effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the large agricultural harvester technical field, specifically relates to a high strength harrow plate of agricultural machinery. BACKGROUND

[0002] As Figure 7 , 8 As shown in the figure, the harrow plate used in the current agricultural harvester is bent from plate material, and the section is U-shaped structure, the top of one side wall of the U-shaped structure is provided with continuous harrow teeth, and the both ends inside the U-shaped structure are welded with reinforcing ribs, which plays a role in improving the overall strength.

[0003] As described above, since the harrow plate is simple in structure, it is currently only used in light load working conditions, and problems such as harrow tooth wear, harrow plate fracture, bending and distortion are prone to occur, which cannot meet the requirements of large harvester for large feeding amount, and therefore it is necessary to improve the structure of the existing harrow plate. CONTENT OF THE UTILITY MODEL

[0004] The utility model discloses a high strength harrow plate of agricultural machinery, which aims to improve the strength and wear resistance of the harrow plate by improving the structure of the harrow plate, so that it can meet the working condition requirements of large harvester for large feeding amount.

[0005] To achieve the above purpose, the technical scheme of the utility model is as follows:

[0006] A high strength harrow plate of agricultural machinery, comprising a harrow plate body with a side section in the shape of a concave character, a protruding portion formed by extending the middle part of the front end of the harrow plate body downward, and an arc wave structure intermittently provided on the top of the front end, wherein the inside of the harrow plate body is uniformly distributed with a plurality of reinforcing ribs, and a plurality of round holes are provided on both sides of the inside of the harrow plate body.

[0007] Preferably, the arc wave structure comprises first arcs arranged at intervals and straight line segments one connected between the top edges of adjacent first arcs, and the junctions of the first arcs and the straight line segments one are provided with rounded corner structures.

[0008] Preferably, the arc wave structure has three segments, which are respectively arranged on the central and left and right sides of the top of the front end of the harrow plate body, and the adjacent arc wave structures are transitioned through straight line segments two, and the length of the straight line segments two is greater than the length of the straight line segments one.

[0009] Preferably, the protruding portion is in the shape of an inverted trapezoid, the corners of the trapezoid are transitioned through second arcs, and the height H of the protruding portion protruding downward accounts for 40%-50% of the total height A of the harrow plate body.

[0010] Preferably, the arc wave structure in the middle and the protruding portion have the following positional relationship: the center symmetry lines of the two are the same.

[0011] Preferably, the reinforcing ribs are 4, including 2 first reinforcing ribs and 2 second reinforcing ribs, the cross section of the middle two first reinforcing ribs is in the shape of a trapezoidal protrusion, the edges of the trapezoidal protrusion are connected by rounded corners, the other two second reinforcing ribs are respectively located at the two ends of the harrow plate body, the outer end surface of the second reinforcing rib is flush with the end surface of the harrow plate body, and each second reinforcing rib is provided with a circular hole penetrating through the bottom plate of the harrow plate body.

[0012] Preferably, the total number of the circular holes is 8, each 4 holes form a group, and the 8 holes are distributed on the bottom plate of the harrow plate body on both sides of the middle circular arc wave structure, the hole diameters of the 8 holes are consistent, in each group of holes, the hole spacing of the middle two holes is C, the hole spacing of the outer two holes is B, and the hole spacing of the inner two holes is D, and the hole spacings satisfy the following relationship: B = D and B > C.

[0013] Preferably, the rear wall bottom end of the position where the reinforcing rib of the end of the harrow plate body is located is provided on a slope, and the slope is connected to the bottom end of the harrow plate body and the outer surface of the rear wall by a rounded corner.

[0014] Preferably, the protruding part is located on the inner surface below the bottom of the harrow plate body to form a first plane, the bottom end of the harrow plate body corresponding to the position of the first plane forms a second plane, the two ends of the first plane and the second plane are both rounded, and the included angle between the first plane and the second plane is greater than or equal to 90 degrees.

[0015] Preferably, the surface of the harrow plate body is subjected to surface strengthening treatment by a shot blasting machine.

[0016] The new type of high-strength harrow plate for agricultural machinery has the following beneficial effects:

[0017] The new type of harrow plate can greatly strengthen the structural strength of the harrow plate body, prolong the service life, and meet the use requirements of large harvesters. At the same time, the structure of the new type is symmetrical and the layout is reasonable, which can enhance the uniformity of stress and the compactness of the structure. The manufacturing method of the new type is preferably by die casting, and the surface strengthening treatment can effectively improve the wear resistance. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The front view structural schematic diagram of the harrow plate body of the new type.

[0019] Figure 2 The top view structural schematic diagram of the harrow plate body of the new type.

[0020] Figure 3 The sectional view structural schematic diagram of the new type in A-A direction.

[0021] Figure 4 The sectional view structural schematic diagram of the new type in B-B direction.

[0022] Figure 5A schematic diagram of the cross-sectional structure of this novel C-axis.

[0023] Figure 6 A schematic diagram of the three-dimensional structure of this novel invention.

[0024] Figure 7 A top view of the existing technology's rake plate structure.

[0025] Figure 8 A schematic diagram of the cross-sectional structure of the existing rake plate in the DD direction.

[0026] 1. Protrusion; 2. First arc; 3. Straight segment one; 4. Reinforcing rib; 5. Circular hole; 6. Inclined surface; 7. Second plane; 8. First plane; 9. Second arc; 10. Straight segment two; 01. Existing rake plate body; 02. Rake teeth of existing rake plate; 03. Reinforcing rib of existing rake plate. Detailed Implementation

[0027] The following description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0028] The following embodiments can be understood as a part of the local structure or method of the present invention, or as a combination of embodiments to explain the connotation of a larger range of structures or methods of the present invention.

[0029] Example 1

[0030] A type of high-strength harrow blade for agricultural machinery, such as Figures 1-6 As shown, the rake plate body includes a "U"-shaped structure in the side cross section. The middle of the front end of the rake plate body extends downward to form a protrusion 1. The top of the front end is intermittently provided with an arc wave structure. Multiple reinforcing ribs 4 are evenly distributed inside the rake plate body. Several round holes 5 are provided on both sides inside the rake plate body.

[0031] Example 2

[0032] like Figure 1 , 2 As shown in Figure 6, the circular wave structure includes a first circular arc 2 arranged at intervals and a straight line segment 3 connecting the top edges of adjacent first circular arcs 2. A rounded corner structure is provided at the junction of the first circular arc 2 and the straight line segment 3.

[0033] It is understandable that the first arc can be an upwardly convex arc structure or a downwardly concave arc structure, and the arc wave structure constitutes the rake teeth of the rake plate body.

[0034] Example 3

[0035] likeFigure 1 , 2 As shown in Figure 6, the circular arc wave structure has three segments, which are respectively located at the center and left and right sides of the top front end of the rake plate body. Adjacent circular arc wave structures are transitioned by straight line segment 2 10, and the length of straight line segment 2 10 is greater than the length of straight line segment 3.

[0036] Example 4

[0037] like Figure 1 As shown, the protrusion 1 is an inverted trapezoidal structure, and the corner of the trapezoidal structure is transitioned by a second circular arc 9. The height H of the protrusion 1 protruding downward accounts for 40%-50% of the total height A of the rake plate body.

[0038] like Figure 1 As shown, the circular wave structure in the middle and the protrusion 1 have the following positional relationship: their central lines of symmetry are the same.

[0039] Example 5

[0040] like Figure 2 , 3 As shown, there are four reinforcing ribs 4, including two first reinforcing ribs and two second reinforcing ribs. The cross-section of the two middle first reinforcing ribs is trapezoidal protrusion, and the edges of the trapezoidal protrusion are transitioned by rounded corners. The other two second reinforcing ribs are located at both ends of the rake plate body. The outer end face of the second reinforcing rib is flush with the end face of the rake plate. Each second reinforcing rib is provided with a round hole 5 that penetrates the bottom of the rake plate body.

[0041] Example 6

[0042] like Figure 2 As shown, there are a total of 8 circular holes 5, arranged in groups of 4, distributed on the bottom plate of the rake plate body on both sides of the central arc wave structure. The diameter of the 8 circular holes is the same. In each group of circular holes, let the distance between the two middle circular holes be C, the distance between the two outer circular holes be B, and the distance between the two inner circular holes be D. Then the hole distances have the following relationship: B = D and B > C.

[0043] Example 7

[0044] like Figure 2 , 4 As shown, the bottom end of the rear wall where the reinforcing rib 4 of the rake plate body is located is provided on the inclined surface 6, and the inclined surface 6 is rounded to transition with the bottom end of the rake plate body and the outer surface of the rear wall.

[0045] Example 8

[0046] like Figure 2 , 5As shown, the convex part 1 is located at the inner surface below the bottom of the harrow plate body, forming a first plane 8, the bottom end of the harrow plate body at the position corresponding to the first plane 8 forms a second plane 7, both ends of the first plane 8 and the second plane 7 are treated with rounded corners, and the included angle between the first plane 8 and the second plane 7 is ≥ 90°.

[0047] The use principle of the novel harrow plate body is as follows:

[0048] The convex part of the novel harrow plate body is integrally formed and extends downward, the first reinforcing rib and the second reinforcing rib are additionally arranged, and then the harrow tooth structure is improved, the continuous harrow tooth structure is improved into a three-segment circular arc wave structure with a straight line segment arranged at intervals, the structure strength of the harrow plate body can be greatly improved, the service life is prolonged, and the use requirements of large harvesters are met. Meanwhile, the structure of the novel harrow plate body is symmetrical and reasonable in layout, the uniformity of stress and the compactness of structure can be improved. The manufacturing method of the novel harrow plate body is preferably mold casting, and the wear resistance can be effectively improved through surface strengthening treatment. The surface strengthening method is as follows: the novel harrow plate body is placed in a shot blasting machine by using a method of hanging in the air, GL40 steel sand is used to impact the surface of the novel harrow plate body, and the duration is 30 minutes.

Claims

1. A high strength agricultural harrow blade characterized by: The harrow plate body comprises a "concave" shaped structure, a protruding part is formed by extending the middle part of the front end of the harrow plate body downward, and a circular arc wave structure is discontinuously arranged on the top of the front end, a plurality of reinforcing ribs are uniformly distributed inside the harrow plate body, and a plurality of round holes are arranged on both sides of the harrow plate body. The circular arc wave structure comprises first circular arcs and straight line segments one connected between the top edges of adjacent first circular arcs, and a fillet structure is arranged at the junction of the first circular arc and the straight line segment one.

2. A high strength harvester blade as claimed in claim 1, wherein: The circular arc wave structure has three sections, which are arranged on the central and left and right sides of the top of the front end of the harrow plate body, and the adjacent circular arc wave structures are connected through straight line segments two, and the length of the straight line segment two is greater than the length of the straight line segment one.

3. A high strength harvester blade as claimed in claim 2, wherein: The protruding part is an inverted trapezoidal structure, the corners of the trapezoidal structure are connected through second circular arcs, and the height H of the protruding part protruding downward accounts for 40%-50% of the total height A of the harrow plate body.

4. A high strength agricultural harrow blade as claimed in claim 3 wherein: The circular arc wave structure in the middle and the protruding part have the same center symmetry line.

5. A high strength agricultural harrow blade as claimed in claim 4 wherein: The reinforcing ribs have four sections, including two first reinforcing ribs and two second reinforcing ribs, the cross section of the middle two first reinforcing ribs is in the shape of a trapezoidal protrusion, the ridge line of the trapezoidal protrusion is connected through a fillet, the other two second reinforcing ribs are arranged at the two ends of the harrow plate body, the outer end surface of the second reinforcing rib is flush with the end surface of the harrow plate body, and each second reinforcing rib is provided with a round hole penetrating through the bottom of the harrow plate body.

6. A high strength agricultural harrow blade as claimed in claim 5 wherein: The total number of the round holes is eight, each four holes form a group, and the eight holes are uniformly distributed on the bottom plate of the harrow plate body on both sides of the circular arc wave structure in the middle, the hole diameters of the eight holes are consistent, the hole spacing of the middle two holes in each group of holes is C, the hole spacing of the outer two holes is B, and the hole spacing of the inner two holes is D, and the hole spacings satisfy the following relationship: B=D and B>C.

7. A high strength agricultural implement drag plate as defined in claim 6 wherein: The bottom end of the rear wall at the position of the reinforcing rib of the end part of the harrow plate body is arranged on a slope, and the slope is connected to the bottom end of the harrow plate body and the outer surface of the rear wall through a fillet.

8. A high strength agricultural harvester sweep according to claim 7 wherein: The inner surface of the protruding part below the bottom of the harrow plate body forms a first plane, the bottom end of the harrow plate body at the position of the first plane forms a second plane, the two ends of the first plane and the second plane are both processed through a fillet, and the included angle between the first plane and the second plane is greater than or equal to 90 degrees.

9. A high strength agricultural harvester sweep according to claim 8 wherein: The surface of the harrow plate body is subjected to surface strengthening treatment through a shot blasting machine.

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